EP 2209832 B1 20120418 - PARTICULATE CATALYST AND CATALYST/STABILISER SYSTEMS FOR PRODUCING HIGH-MOLECULAR-WEIGHT HOMOPOLYESTERS AND COPOLYESTERS OF L-, D- OR D,L-LACTIC ACID
Title (en)
PARTICULATE CATALYST AND CATALYST/STABILISER SYSTEMS FOR PRODUCING HIGH-MOLECULAR-WEIGHT HOMOPOLYESTERS AND COPOLYESTERS OF L-, D- OR D,L-LACTIC ACID
Title (de)
PARTIKULÄRE KATALYSATOR- UND KATALYSATOR/STABILISATOR-SYSTEME ZUR HERSTELLUNG HOCHMOLEKULARER HOMO- UND COPOLYESTER VON L-, D- ODER D,L-MILCHSÄURE
Title (fr)
SYSTÈMES À CATALYSEUR PARTICULAIRE ET À CATALYSEUR/STABILISATEUR PARTICULAIRE POUR LA PRODUCTION D'HOMOPOLYESTERS ET DE COPOLYESTERS D'ACIDE LACTIQUE L, D OU D,L AYANT UN POIDS MOLÉCULAIRE ÉLEVÉ
Publication
Application
Priority
- AT 2008000412 W 20081114
- AT 18372007 A 20071114
Abstract (en)
[origin: US2010317797A1] The invention relates to a method for the production of high-molecular homo- and Copolyesters of L-, D- and D,L-lactic acids that comprises the process steps of i) the polycondensation of a lactic acid or polytransesterification of esters thereof to a polymeric lactic acid, ii) the cyclizing depolymerization of the polymeric lactic acid to dilactides, and iii) the ring-opening polymerization of the dilactides or mixtures thereof with suitable comonomers, characterized in that in at least one of the process steps i) to iii), a particulate catalyst and/or a particulate stabilizer, each having an average particle diameter of 1 to 100 nm, is/are used in a heterogeneous reaction mixture.
IPC 8 full level
C08G 63/82 (2006.01)
CPC (source: EP US)
C08G 63/823 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
US 2010317797 A1 20101216; AT 506040 A1 20090515; AT 506040 B1 20120315; AT E554124 T1 20120515; CA 2705416 A1 20090522; DK 2209832 T3 20120716; EP 2209832 A1 20100728; EP 2209832 B1 20120418; ES 2386313 T3 20120817; PL 2209832 T3 20120928; PT 2209832 E 20120718; WO 2009062223 A1 20090522
DOCDB simple family (application)
US 74218508 A 20081114; AT 08849723 T 20081114; AT 18372007 A 20071114; AT 2008000412 W 20081114; CA 2705416 A 20081114; DK 08849723 T 20081114; EP 08849723 A 20081114; ES 08849723 T 20081114; PL 08849723 T 20081114; PT 08849723 T 20081114